Hunter Board is a 34 mph electric skateboard with a unique suspension system - The Verge
Reference: Skateboard Suspension Truck | Mike Cane's Atomic Supermen
Stellar 33" Suspension Skateboard – Cruz Control Skate Co
Mountain Skateboard Conversion Kit with Stronger Motor Bracket Off Road Board Truck with 190KV N63 Motor (Drive Truck) : Sports & Outdoors - Amazon.com